Shock absorber for racket

ABSTRACT

A shock absorber or a racket contains: a body and at least two magnetic elements. The body is mounted on strings of the racket and includes an accommodation groove defined therein, the at least two magnetic elements are housed in the accommodation groove of the body, wherein one of the at least two magnetic elements slides in the accommodation groove of the body, and the at least two magnetic elements are fixed at a same magnetic pole and face to each other so that magnetic repulsion produces between the at least two magnetic elements.

FIELD OF THE INVENTION

The present invention relates to a shock absorber for a racket in which at least two magnetic elements are fixed at a same magnetic pole and face to each other so that magnetic repulsion produces between the at least two magnetic elements to eliminate vibration quickly.

BACKGROUND OF THE INVENTION

A conventional shock absorber for a racket is disclosed in TW Publication No. 545267 filed by the applicant and contains a flexible body, and the flexible body has a locking slot configured to retain strings of a racket, the flexible body also has an orifice for housing a metal ball, hence when the strings hit tennis ball, vibration of the strings conducts to the flexible body, and the metal ball shakes in the orifice to consume vibration.

However, the metal ball contacts an inner wall of the orifice to cause shaking for a period of time, thus eliminating the vibration of the stings slowly.

The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a shock absorber for a racket in which at least two magnetic elements are fixed at a same magnetic pole and face to each other so that magnetic repulsion produces between the at least two magnetic elements to eliminate vibration quickly.

To obtain above-mentioned objective, a shock absorber for a racket provided by the present invention contains: a body and at least two magnetic elements.

The body is mounted on strings of the racket and includes an accommodation groove defined therein, the at least two magnetic elements are housed in the accommodation groove of the body, wherein one of the at least two magnetic elements slides in the accommodation groove of the body, and the at least two magnetic elements are fixed at a same magnetic pole and face to each other so that magnetic repulsion produces between the at least two magnetic elements.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the exploded components of a shock absorber for a racket according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the assembly of the shock absorber for the racket according to the first embodiment of the present invention.

FIG. 3 is a cross sectional view showing the assembly of the shock absorber for the racket according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing the application of the shock absorber for the racket according to the first embodiment of the present invention.

FIG. 5 is a cross sectional view showing the operation of the shock absorber for the racket according to the first embodiment of the present invention.

FIG. 6 is a perspective view showing the exploded components of a shock absorber for a racket according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing the assembly of the shock absorber for the racket according to the second embodiment of the present invention.

FIG. 8 is a cross sectional view showing the assembly of the shock absorber for the racket according to the second embodiment of the present invention.

FIG. 9 is a perspective view showing the application of the shock absorber for the racket according to the second embodiment of the present invention.

FIG. 10 is a cross sectional view showing the operation of the shock absorber for the racket according to the second embodiment of the present invention.

FIG. 11 is a perspective view showing the exploded components of a shock absorber for a racket according to a third embodiment of the present invention.

FIG. 12 is a perspective view showing the assembly of the shock absorber for the racket according to the third embodiment of the present invention.

FIG. 13 is a cross sectional view showing the assembly of the shock absorber for the racket according to the third embodiment of the present invention.

FIG. 14 is a perspective view showing the application of the shock absorber for the racket according to the third embodiment of the present invention.

FIG. 15 is a cross sectional view showing the operation of the shock absorber for the racket according to the third embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference to FIGS. 1 to 3, a shock absorber 10 for a racket 20 according to a first embodiment of the present invention comprises: a body 11, a first magnetic element 12, and a second magnetic element 13. The body 11 is mounted on strings 21 of the racket 20 so as to absorb vibration as the racket 20 hits tennis ball and includes an accommodation groove 111 defined therein. The body 11 is made of flexible material and also includes a vibration absorbing block 112 and a locking slot 113 formed on the vibration absorbing block 112 so as to retain strings 21 of the racket 20. The accommodation groove 111 of the body 11 accommodates at least two magnetic elements, one of which slides in the accommodation groove 111 of the body 11. In this embodiment, two magnetic elements are housed in the accommodation groove 111 and are fixed at a same magnetic pole, such as N pole or S pole, wherein the two magnetic elements face to each other so that magnetic repulsion produces between the two magnetic elements. For example, the first magnetic element 12 and the second magnetic element 13 are housed in the accommodation groove 111 of the body 11, wherein the first magnetic element 12 slides in the accommodation groove 111 of the body 11, and the second magnetic element 13 is fixed on a first end of the accommodation groove 111 of the body 11 at the N pole or the S pole and faces to the first magnetic element 12 on a second end of the accommodation groove 11, hence the magnetic repulsion produces between the first magnetic element 12 and the second magnetic element 13, and the first magnetic element 12 keeps a distance from the second magnetic element 13. In this embodiment, each of the first magnetic element 12 and the second magnetic element 13 is annular, and the accommodation groove 11 has two annular tabs 114, 115 disposed therein so as to limit the second magnetic element 13 on the first end of the accommodation groove 111 of the body 11. The accommodation groove 111 of the body 11 further has a stop portion 116 formed on the second end thereof so as to stop a removal of the first magnetic element 12 from the accommodation groove 111 of the body 11. The accommodation groove 111 of the body 11 further has a steel ball 14 housed therein so that the first magnetic element 12 magnetically attracts the steel ball 12, thus increasing weight and shock absorption.

Referring to FIGS. 4 and 5, the locking slot 113 of the vibration absorbing block 112 of the body 11 retains with the strings 21 of the racket 20 so that the body 11 is fixed on the strings 21 of the racket 20. As the stings 21 of the racket 20 hit tennis ball to cause vibration, the vibration of the stings 21 of the racket 20 conducts to the body 11 so that the first magnetic element 12 and the steel ball 14 slide and shake in the accommodation groove 111 of the body 11, and the magnetic repulsion between the first magnetic element 12 and the second magnetic element 13 cushions the vibration, hence the first magnetic element 12 and the steel ball 14 stop movement and eliminate vibration quickly.

As shown in FIGS. 6 to 8, a shock absorber 30 for a racket 20 according to a second embodiment of the present invention comprises: a body 31, a first magnetic element 32, and a second magnetic element 33. The body 31 is mounted on strings 21 of the racket 20 so as to absorb vibration as the racket 20 hits tennis ball. The body 31 is tubular and includes an accommodation groove 311 defined therein, and the body 31 also includes a first absorbing block 312 and a second absorbing block 313 which are fitted on the body 31 and are made of flexible material, wherein the first absorbing block 312 has a first locking slot 314 defined thereon, and the second absorbing block 313 has a second locking slot 315 defined thereon, such that the first locking slot 314 and the second locking slot 315 retain the strings 21 of the racket 20. The accommodation groove 311 of the body 31 accommodates at least two magnetic elements, one of which slides in the accommodation groove 311 of the body 31. In this embodiment, two magnetic elements are housed in the accommodation groove 311 and are fixed at a same magnetic pole, such as N pole or S pole, wherein the two magnetic elements face to each other so that magnetic repulsion produces between the two magnetic elements. For example, the first magnetic element 32 and the second magnetic element 33 are housed in the accommodation groove 311 of the body 31, wherein the first magnetic element 32 slides in the accommodation groove 311 of the body 31, and the second magnetic element 33 is fixed on a first end of the accommodation groove 31 of the body 31 at the N pole or the S pole and faces to the first magnetic element 32 on a second end of the accommodation groove 31, hence the magnetic repulsion produces between the first magnetic element 32 and the second magnetic element 33, and the first magnetic element 32 keeps a distance from the second magnetic element 33. In this embodiment, each of the first magnetic element 32 and the second magnetic element 33 is annular, and the accommodation groove 31 has two annular tabs 316, 317 disposed therein so as to limit the second magnetic element 33 on the first end of the accommodation groove 311 of the body 31. The accommodation groove 311 of the body 31 further has a stop portion 318 formed on the second end thereof so as to stop a removal of the first magnetic element 32 from the accommodation groove 311 of the body 31. The accommodation groove 311 of the body 31 further has a steel ball 34 housed therein so that the first magnetic element 32 magnetically attracts the steel ball 34, thus increasing weight and shock absorption.

Referring to FIGS. 9 and 10, the first locking slot 314 of the first vibration absorbing block 312 and the second locking slot 315 of the second vibration absorbing block 313 retain with the strings 21 of the racket 20 so that the body 31 is fixed on the strings 21 of the racket 20. As the stings 21 of the racket 20 hit tennis ball to cause vibration, the vibration of the stings 21 of the racket 20 conducts to the body 31 so that the first magnetic element 32 and the steel ball 34 slide and shake in the accommodation groove 311 of the body 31, and the magnetic repulsion between the first magnetic element 32 and the second magnetic element 33 cushions the vibration, hence the first magnetic element 32 and the steel ball 34 stop movement and eliminate vibration quickly.

With reference to FIGS. 11 to 13, a shock absorber 40 for a racket 20 according to a third embodiment of the present invention comprises: a body 41, a first magnetic element 42, and a second magnetic element 43. The body 41 is mounted on strings 21 of the racket 20 so as to absorb vibration as the racket 20 hits tennis ball. The body 41 is tubular and includes an accommodation groove 411 defined therein, and the body 41 also includes a first absorbing block 412 and a second absorbing block 413 which are fitted on the body 41 and are made of flexible material, wherein the first absorbing block 412 has a first locking slot 414 defined thereon, and the second absorbing block 413 has a second locking slot 415 defined thereon, such that the first locking slot 414 and the second locking slot 415 retain the strings 21 of the racket 20. The accommodation groove 411 of the body 41 accommodates at least two magnetic elements which slide in the accommodation groove 411 of the body 41. In this embodiment, two magnetic elements are housed in the accommodation groove 411 and are fixed at a same magnetic pole, such as N pole or S pole, wherein the two magnetic elements face to each other so that magnetic repulsion produces between the two magnetic elements. For example, the first magnetic element 42 and the second magnetic element 43 are housed and slide in the accommodation groove 411 of the body 41, and the second magnetic element 43 is fixed on a first end of the accommodation groove 41 of the body 41 at the N pole or the S pole and faces to the first magnetic element 44 on a second end of the accommodation groove 41, hence the magnetic repulsion produces between the first magnetic element 42 and the second magnetic element 43, and the first magnetic element 42 keeps a distance from the second magnetic element 43. In this embodiment, each of the first magnetic element 42 and the second magnetic element 43 is annular, and the accommodation groove 41 has an annular tab 416 disposed therein so as to limit the second magnetic element 43 on the first end of the accommodation groove 411 of the body 41. The accommodation groove 411 of the body 41 further has a stop portion 417 formed on the second end thereof so as to stop a removal of the first magnetic element 42 from the accommodation groove 411 of the body 41. The accommodation groove 411 of the body 41 further has a first steel ball 44 and a second steel ball 45 which are housed therein so that the first magnetic element 42 magnetically attracts the first steel ball 44, and the second magnetic element 43 magnetically attracts the second steel ball 45, thus increasing weight and shock absorption.

Referring to FIGS. 14 and 15, the first locking slot 414 of the first vibration absorbing block 412 and the second locking slot 415 of the second vibration absorbing block 413 retain with the strings 21 of the racket 20 so that the body 41 is fixed on the strings 21 of the racket 20. As the stings 21 of the racket 20 hit tennis ball to cause vibration, the vibration of the stings 21 of the racket 20 conducts to the body 41 so that the first magnetic element 42, the second magnetic element 43, the first steel ball 44, and the second steel ball 45 slide and shake in the accommodation groove 411 of the body 41, and the magnetic repulsion between the first magnetic element 42 and the second magnetic element 43 cushions the vibration, hence the first magnetic element 42, the second magnetic element 43, the first steel ball 44, and the second steel ball 45 stop movement and eliminate vibration quickly.

While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention. 

What is claimed is:
 1. A shock absorber or a racket comprising: a body mounted on strings of a racket and including an accommodation groove defined therein; at least two magnetic elements housed in the accommodation groove of the body, wherein one of the at least two magnetic elements slides in the accommodation groove of the body, and the at least two magnetic elements are fixed at a same magnetic pole and face to each other so that magnetic repulsion produces between the at least two magnetic elements.
 2. The shock absorber or the racket as claimed in claim 1, wherein the body is made of flexible material and also includes a vibration absorbing block and a locking slot formed on the vibration absorbing block so as to retain strings of the racket.
 3. The shock absorber or the racket as claimed in claim 1, wherein the body is tubular and includes a first absorbing block and a second absorbing block which are fitted on the body and are made of flexible material, wherein the first absorbing block has a first locking slot defined thereon, and the second absorbing block has a second locking slot defined thereon, such that the first locking slot and the second locking slot retain the strings of the racket.
 4. The shock absorber or the racket as claimed in claim 1, wherein a first magnetic element and a second magnetic element are housed in the accommodation groove of the body, and the first magnetic element slides in the accommodation groove of the body, the second magnetic element is fixed on a first end of the accommodation groove of the body and faces to the first magnetic element on a second end of the accommodation groove, hence the magnetic repulsion produces between the first magnetic element and the second magnetic element.
 5. The shock absorber or the racket as claimed in claim 4, wherein the accommodation groove of the body has two annular tabs disposed therein so as to limit the second magnetic element on the first end of the accommodation groove of the body; the accommodation groove of the body further has a stop portion formed on the second end thereof so as to stop a removal of the first magnetic element from the accommodation groove of the body.
 6. The shock absorber or the racket as claimed in claim 4, wherein the accommodation groove of the body further has a steel ball housed therein so that the first magnetic element magnetically attracts the steel ball.
 7. The shock absorber or the racket as claimed in claim 1, wherein a first magnetic element and a second magnetic element are housed and slide in the accommodation groove of the body, the second magnetic element is fixed on a first end of the accommodation groove of the body and faces to the first magnetic element on a second end of the accommodation groove, hence the magnetic repulsion produces between the first magnetic element and the second magnetic element.
 8. The shock absorber or the racket as claimed in claim 7, wherein the accommodation groove has an annular tab disposed therein so as to limit the second magnetic element on the first end of the accommodation groove of the body, and the accommodation groove of the body further has a stop portion formed on the second end thereof so as to stop a removal of the first magnetic element from the accommodation groove of the body.
 9. The shock absorber or the racket as claimed in claim 7, wherein the accommodation groove of the body further has a first steel ball and a second steel ball which are housed therein so that the first magnetic element magnetically attracts the first steel ball, and the second magnetic element magnetically attracts the second steel ball.
 10. The shock absorber or the racket as claimed in claim 1, wherein each of the first magnetic element and the second magnetic element is annular. 